diff --git a/hgext/graphlog.py b/hgext/graphlog.py
--- a/hgext/graphlog.py
+++ b/hgext/graphlog.py
@@ -8,7 +8,7 @@
 '''show revision graphs in terminal windows
 
 This extension adds a --graph option to the incoming, outgoing and log
-commands. When this options is given, an ascii representation of the
+commands. When this options is given, an ASCII representation of the
 revision graph is also shown.
 '''
 
diff --git a/hgext/win32mbcs.py b/hgext/win32mbcs.py
--- a/hgext/win32mbcs.py
+++ b/hgext/win32mbcs.py
@@ -25,7 +25,7 @@ This extension is usefull for:
    case-insensitive file system.
 
 This extension is not needed for:
- * Any user who use only ascii chars in path.
+ * Any user who use only ASCII chars in path.
  * Any user who do not use any of problematic encodings.
 
 Note that there are some limitations on using this extension: